Spa shell



FIG. 1 is a perspective view of a spa shell showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a cross-sectional view thereof, taken in the direction of line4-4 of FIG. 3;

FIG. 5 is a cross-sectional view thereof, taken in the direction of line5-5 of FIG. 3;

FIG. 6 is a cross-sectional view thereof, taken in the direction of line6-6 of FIG. 3;

FIG. 7 is a cross-sectional view thereof, taken in the direction of line7-7 of FIG. 3;

FIG. 8 is a cross-sectional view thereof, taken in the direction of line8-8 of FIG. 3; and,

FIG. 9 is a cross-sectional view thereof, taken in the direction of line9-9 of FIG. 3.

The broken lines show portions of the spa shell that form no part of theclaimed design.

CLAIM The ornamental design for a spa shell, as shown and described.